Trolley head and harp.



J. SIRAGUSA & R. E. WOOD.

TROLLEY HEAD AND HARP. APPLICATION FILED MAR. 4, 1910.

994,039 Patented May 30,1911.

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J'QHN SIRAGUSA AND ROBERT E. U603, 03 CHIGAGO, ILLINOIS.

TROLLEY HEAD AND HARP.

assess.

this character which shall form a knock down clip about the trolley wireinsuring the necessary electrical contact under a variety of conditionsuntil the trolley is pulled oil the wire by the operator.

It is also an object of the invention to safely arrange in protectedpositions parts liable to injury and to provide a compact structurewhich may be readily repaired.

Further objects and advantages will be more fully described hereafterand pointed out in the claims.

In the accompanying drawings, we have shown a device embodying ourinvention in one of its preferred terms.

Figure 1 a iti'ont,yie .v ot a harp trolley head: Fig. 2 a side Viewthcrco't'; Fig. 3 a section taken on line ot Fig". 2. a :1 section takenon line of Fig. 2 and Fig. 5 a view in perspective of an annular contactplate for obtaining electrical connection between the wheel and clip andthe harp fork.

in the drawings, 6 indicates a trolley pole, to which is welded orotherwise suitably cured a hollow harp 7 with forks 8 and 9 on oppositesides recessed at. the tops to support an axle 10. The trolley wheel W,providcd with a hub portion 1." and an axial opening 12, is mounted toturn loosely upon the enlarged portion 10 of the axle ill. The axle maybe conveniently oiled through opening 13, threaded interiorly andnormally closed by the screw 1-1. For the purpose of maintainingelectrical contact the wheel WV is preferably made of copper and theharp and trolley pole of iron, or other material with less electricalconductivity. The wheel. isprovidcd with a deep circunn 't'erentialgroove 15 with outwardly flaring oppositely inclined flanges 1G and 17.The axle 10 is cut away at the ends as shown in Specification of LettersPatent.

Application filed March A, 1910.

Patented May S ill, 1 .9111...

Serial No. 547,328.

Fig. 3. In the ends of axle portion 10 are drilled, parallel to the axlebut on opposite v with hole 18 and the latter" with hole 19.-

llub 11 projecting over the ends of axle portion 10 forms a cup at theends in which are placed springs S and S, the ends of S inserted inholes 19 and 20 and the ends of S in holes 18 and 29, both springs beingtightly coiled like a clock spring about axle 10. The arm R is heldpressed against the coil spring S by a nut 21 interiorly threaded on theouter threaded end of axle l0 and pressing against a plate 22intermediate of the rocking arm R and the nut 2 The arms ll K have thuscapacity for bodily movement along axle 10 against tension of springs SS. The relative positions of openings 19 and 20 in which the ends of thecoiled spring S are inserted, as shown in Fig. 3, are such that thetension thereof tends to hold rocking arm 1 in vertical position bearingconstantly upon a bumper 23, rigidly supported on a cross bar 23, oneend of which is rigidly secured to the fork 9 of harp 7, ahd the otherto the forward end of plate tln the other end of the axle 10, arm Rholds spring S tightly coiled about axle 10. The arm. is held inposition by interiorly threaded nut 25 on threads 26 of axle 10 whichoperates against'plate 27 to hold the hub portion 28 of rocking bait Ragainst the outward pressure of spring S. The tension of this spring andthe relative positions of the openings 18 and 29 are such that thetension thereof tends to hold rocking arm it against. a bumper 24mounted on bifurcated piece 8 of harp 7 and the rear end of plate 27.

ltigidly mounted intermediate of the hub portion 11 of wheel W and fork8 on one side and fork it on the other, are the annular contact plates1, shown in Fig. 5. Each of these plates is provided on the sideadjacent, to the 't'orlr with lugs 30 and 31 projecting therethrough andcontacting with the forks of a Y shaped piece 32 secured at 33 and 34:in any suitable manner to the harp 7. These a shaped pieces are inultimate electrical contact with the motor in the car, and areprefivrably constructed of copper. The plates P are also preferablyconstructed of copper. as is the wheel 'W' and the rocking ice and 2.These surfaces are curved as shown so as to form a clip about the WireA. It will he observed that they are inclined outwardly and oppositelyat the points a and s and inwardly and oppositely at the points a anda7. At their points of nearest approach they are held so close togetherthat when the wire enters or-leavcs thev clip thereby formed they musthe pushed apart against a yielding resistance. This we prefer to provldeon the axle 10 intermediate of the plates 27 and 22 and arms R R bymountm upwardly projecting'springs 39 and a0, curved as shown in Fig. 1,adapted to exert tension upon the arms R- and R and press their upperends toward each other. The springs 39 and 40 are adapted to hold thevsurfaces 4:1 and 42 so near together that the space between is lessthan the diameter of the wire A. It will thus be seen that when thetrolley spring (not shown} is released to raise the trolley to aproachthe Wire A that it is no very di icult matter for the operator to bringone or the other of the surfaces a underneath the wire, and that whenthis is done the, wire itself guides the trolley so that 1t rides uponthese inv clinedsurfaces, pushing the surfaces 451 and apart anddropping into a concave groove 15 on the Wheel /V. When the trolleypasses over a crossing the arms R R,

heing elastically supported on axle 10 "by the springs 53 53", arethrown down by the cross guard and immediately thereafter assume theirupright POSICIOH, In the upright position should thewiroleave the groove15- will contact with the surfaces 0 and a until restored. l hen thetrolley is pull-ed down, the wire A slips down the inclined surfaces 0and d, presses apart rocking arms R at the points 41 and and is freed.

We aware that many modifications of our invention will occur to thoseskilled in art, and we do not wish to he understood as limitingourselves to the preferred form herein described and shown, but

"What we claim is Lin a trolley head and harp, the com.- hination'withan axle and a trolley wheel mounted thereon, oi arjms'mounted to turn onsaid shaft at each side of said wheel and also to have a slight lateralrocking movement thereon, elastic yielding means for normally holdingsaid arms erect above said wheel, and also tending to press the lowerends ofsaid arms away from said Wheel, and means for yieldingly pressingthe upper ends of said arms toward each other.

2. In a trolley head and harp, an axle having end portions of lessdiameter than i the middle portion thereof, a trolley wheel mounted torotate upon said middle portion having a hub projecting at each sidebeyond said middle portion to form spring receiving recesses, armsloosely mounted on the end portions of said axle at each side of saidwheel, springs coiled about the reduced portions of said axle withinsaid recesses, each spring having one end secured to "the axle and theother end secured to one of said arms, said springs operating tonormally hold said arms in a substantially vertical position, and alsotending to press the lower ends of said armsoutwardl y, and means oryieldingly pressing the upper ends of said arms toward each other.

In testimony whereof we have hereunto affixed our signatures in thepresence of two witnesses. y Y

JOHN Slide. lUSA. ROBERT E. WOQD.

Witnesses Bonner Cirrnnmvooo, l lnnmn ll. GALLAHAN.

